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03-22-2009, 07:13 AM
| #1 |
| Junior Member Join Date: Mar 2009
Posts: 1
 | 77 gmc ? I looked at a 77 1/2 ton 4x4 gmc yesterday, the truck is in great condition, the moter sounds realy strong, and the trany shifts good. But every time I would let off of the gas I could feel and hear a clunk coming form under the seat, it kind of sounded like something was sepperating, it did it at all speads every time. do you think that it could be something more serous than just a u joint? if it is it could change my mind on buying it. |
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03-22-2009, 08:44 AM
| #2 |
| Senior Member  Join Date: Mar 2008 Location: N.Y.
Posts: 4,300
 | welcome to the forum May be a u-joint do you have pics? how much? where is it from
__________________ 4 wheels move the body 2 wheels move the soul B.W.A.I |
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03-22-2009, 08:45 AM
| #3 |
| Senior Member  Join Date: Jul 2008 Location: davenport iowa 52806
Posts: 246
| clunk could be u-joint's, slip yoke transfer case mount .it's got some age on it ,thing's are wearing out . i know on used trucks they go through a series of owner's and the work gets done a little at a time .i know i have had my share of them .  |
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03-27-2009, 05:00 AM
| #4 |
| Senior Member  Join Date: Nov 2006 Location: Houston,Texas
Posts: 4,033
| It could even be your trans mount just get a crow bar and try lifting up on trans you will see if it's busted. |
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03-28-2009, 01:46 PM
| #5 |
| Senior Member  Join Date: Jul 2008 Location: OKC, OK
Posts: 3,149
| Are you sure it wasn't the owner's bottle of vodka under the seat rolling forward and hitting the seat brace? |
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03-28-2009, 06:29 PM
| #6 |
| Senior Member  Join Date: Nov 2008 Location: Vernal Utah
Posts: 1,135
| ^^^^ If it was my old truck, that may be the issue...... |
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